public IHttpActionResult PutXeDangKy(int id, XeDangKy xeDangKy)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            if (id != xeDangKy.ma_dang_ky)
            {
                return(BadRequest());
            }

            db.Entry(xeDangKy).State = EntityState.Modified;

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!XeDangKyExists(id))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(StatusCode(HttpStatusCode.NoContent));
        }
        public IHttpActionResult GetXeDangKy(int id)
        {
            XeDangKy xeDangKy = db.XeDangKies.Find(id);

            if (xeDangKy == null)
            {
                return(NotFound());
            }

            return(Ok(xeDangKy));
        }
        public IHttpActionResult PostXeDangKy(XeDangKy xeDangKy)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            db.XeDangKies.Add(xeDangKy);
            db.SaveChanges();

            return(CreatedAtRoute("DefaultApi", new { id = xeDangKy.ma_dang_ky }, xeDangKy));
        }
        public IHttpActionResult DeleteXeDangKy(int id)
        {
            XeDangKy xeDangKy = db.XeDangKies.Find(id);

            if (xeDangKy == null)
            {
                return(NotFound());
            }

            db.XeDangKies.Remove(xeDangKy);
            db.SaveChanges();

            return(Ok(xeDangKy));
        }